[Biceps crural myositis after an insect bite].

[focal myositis]

It can be difficult to diagnose focal muscular disease . We report a case of crural biceps focal myositis after an insect bite .We then discuss diagnostics of one or a small number of muscle injury . Focal inflammatory myositis has been described . We emphasize the role of pathology . In our case , pathological examination rules out inflammatory or tumoral disease and access likely toxical etiology . Muscle injury can appear , most frequently around the bite of venomous animal .Hymenopters are often responsible for such stings in France . Venoms are toxic for muscle cells membrane .